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## Ron90's Content

There have been 15 items by Ron90 (Search limited from 27-November 20)

### #101422 Exam

Posted by Ron90 on 27 May 2008 - 09:34 PM in Biology

1. C 11. B 21. C

2. D 12. D 22. B

3. C 13. A 23. B

4. D 14. A 24. A

5. B 15. D 25. C

6. A 16. D

7. D 17. C

8. A 18. A

9. B 19. A

10. A 20. B

### #101261 Exam 2008 Post Mortem

Posted by Ron90 on 20 May 2008 - 01:44 PM in Mathematics

### #101229 Good luck!

Posted by Ron90 on 19 May 2008 - 05:52 PM in Mathematics

### #101207 2007 Paper 1 Q9(a)

Posted by Ron90 on 19 May 2008 - 02:26 PM in Mathematics

(a) Find the exact values where the graph of y = f(x) meets the x- and y-axes.

Ive found where it crosses the y-axis by making the x = 0 and got it as (0,0) which is correct.

However how do u find where it meets the x-axis? (apart from 0,0)

### #101194 Logs

Posted by Ron90 on 18 May 2008 - 05:22 PM in Mathematics

is 10^x the inverse of log(base10)x ?

is e^x the inverse of ln?

Is log(baseE) the same as ln?

### #101143 2007 specamin non calc q4 multiple choice

Posted by Ron90 on 16 May 2008 - 04:08 PM in Mathematics

### #101141 2006 paper II Q10(b)

Posted by Ron90 on 16 May 2008 - 04:02 PM in Mathematics

### #101139 2007 specamin non calc q4 multiple choice

Posted by Ron90 on 16 May 2008 - 03:57 PM in Mathematics

Ive done it as well and I got C.

So I guess your answer book is wrong.

### #101138 2006 paper II Q10(b)

Posted by Ron90 on 16 May 2008 - 03:50 PM in Mathematics

Ive looked at a solution to it and it goes like this:

25cos(x-1.29) = 1

then to

x = + 1.29

im confused how this is done. Any help?

### #100700 More Help

Posted by Ron90 on 21 January 2008 - 08:32 PM in Mathematics

Ok what you have is right, the graph shows it hits 0 twice before 60 and so that P points to the second one so that makes sense. Thanks!

### #100698 More Help

Posted by Ron90 on 21 January 2008 - 08:00 PM in Mathematics

### #100695 More Help

Posted by Ron90 on 21 January 2008 - 07:37 PM in Mathematics

(b) Determine the exact value of the

x-coordinate of P, the point where

the graph intersects the x-axis

I have figured out the eq of function is: y = 2Sin(3x)-1 0<x<120

Any ideas? Thanks

### #100685 Need Help with Question

Posted by Ron90 on 20 January 2008 - 02:01 AM in Mathematics

### #100681 Need Help with Question

Posted by Ron90 on 19 January 2008 - 04:55 PM in Mathematics

11. (a) Express f(x) = (sq root)3 cos x + sin x in the form kcos (x – a), where k > 0 and

0 < a < pi/2

(b) Hence or otherwise sketch the graph of y = f(x) in the interval 0 ≤ x ≤ 2pi

Thanks again.

### #100680 Need Help with Question

Posted by Ron90 on 19 January 2008 - 04:16 PM in Mathematics

A function f is defined by the formula f(x) = 3x – x3.

Find the exact values where the graph of y = f(x) meets the x- and y-axes

Thanks in advance

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